xps: Transmit Packet Steering

[net-next-2.6.git] / include / linux / netdevice.h

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index b45c1b8b1d19961b73a146e0e43b732705a2b322..badf9285fe0dbda63b24b6fccc05dcb90d2c4289 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -503,6 +503,10 @@ struct netdev_queue {
        struct Qdisc            *qdisc;
        unsigned long           state;
        struct Qdisc            *qdisc_sleeping;
+#ifdef CONFIG_RPS
+       struct kobject          kobj;
+#endif
+
 /*
  * write mostly part
  */
@@ -529,6 +533,30 @@ struct rps_map {
 };
 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
 
+/*
+ * This structure holds an XPS map which can be of variable length.  The
+ * map is an array of queues.
+ */
+struct xps_map {
+       unsigned int len;
+       unsigned int alloc_len;
+       struct rcu_head rcu;
+       u16 queues[0];
+};
+#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
+#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map))   \
+    / sizeof(u16))
+
+/*
+ * This structure holds all XPS maps for device.  Maps are indexed by CPU.
+ */
+struct xps_dev_maps {
+       struct rcu_head rcu;
+       struct xps_map *cpu_map[0];
+};
+#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) +               \
+    (nr_cpu_ids * sizeof(struct xps_map *)))
+
 /*
  * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
  * tail pointer for that CPU's input queue at the time of last enqueue.
@@ -1016,6 +1044,8 @@ struct net_device {
        unsigned long           tx_queue_len;   /* Max frames per queue allowed */
        spinlock_t              tx_global_lock;
 
+       struct xps_dev_maps     *xps_maps;
+
        /* These may be needed for future network-power-down code. */
 
        /*